Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/206273
Title: 48-V Voltage Regulator Module With PCB Winding Matrix Transformer for Future Data Centers
Authors: Mohamed H. Ahmed;Chao Fei;Fred C. Lee;Qiang Li
Year: 2017
Publisher: IEEE
Abstract: Efficient power delivery architecture is gaining more attention in the design of future generations of data centers in order to minimize the ever increasing trend of power consumption. Silicon-based power delivery architectures and designs have already reached a level of maturity in terms of efficiency and density. Recent studies indicate that 48-V voltage regulator modules (VRMs), instead of 12-V VRMs, are deemed a more efficient and cost effective architecture. In this paper a Gallium Nitride (GaN) based design of a two-stage solution is proposed. The first stage is a 48 V/12 V-250 W LLC converter with a matrix transformer design operating at 1.6 MHz with a peak efficiency of 97.3% and a power density of 870 W/in<sup>3</sup>. The second stage is a 12/1.8 V multiphase buck converter which can be either a conventional silicon-based or a GaN-based design with a higher operating frequency and power density. Furthermore, in this proposed two-stage architecture, a novel light load improvement mechanism is proposed by dynamically changing the bus voltage from 12 to 6 V during light load by which the system can achieve a more than 8% efficiency improvement.
URI: http://localhost/handle/Hannan/206273
volume: 64
issue: 12
More Information: 9302,
9310
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7938363.pdf1.56 MBAdobe PDF
Title: 48-V Voltage Regulator Module With PCB Winding Matrix Transformer for Future Data Centers
Authors: Mohamed H. Ahmed;Chao Fei;Fred C. Lee;Qiang Li
Year: 2017
Publisher: IEEE
Abstract: Efficient power delivery architecture is gaining more attention in the design of future generations of data centers in order to minimize the ever increasing trend of power consumption. Silicon-based power delivery architectures and designs have already reached a level of maturity in terms of efficiency and density. Recent studies indicate that 48-V voltage regulator modules (VRMs), instead of 12-V VRMs, are deemed a more efficient and cost effective architecture. In this paper a Gallium Nitride (GaN) based design of a two-stage solution is proposed. The first stage is a 48 V/12 V-250 W LLC converter with a matrix transformer design operating at 1.6 MHz with a peak efficiency of 97.3% and a power density of 870 W/in<sup>3</sup>. The second stage is a 12/1.8 V multiphase buck converter which can be either a conventional silicon-based or a GaN-based design with a higher operating frequency and power density. Furthermore, in this proposed two-stage architecture, a novel light load improvement mechanism is proposed by dynamically changing the bus voltage from 12 to 6 V during light load by which the system can achieve a more than 8% efficiency improvement.
URI: http://localhost/handle/Hannan/206273
volume: 64
issue: 12
More Information: 9302,
9310
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7938363.pdf1.56 MBAdobe PDF
Title: 48-V Voltage Regulator Module With PCB Winding Matrix Transformer for Future Data Centers
Authors: Mohamed H. Ahmed;Chao Fei;Fred C. Lee;Qiang Li
Year: 2017
Publisher: IEEE
Abstract: Efficient power delivery architecture is gaining more attention in the design of future generations of data centers in order to minimize the ever increasing trend of power consumption. Silicon-based power delivery architectures and designs have already reached a level of maturity in terms of efficiency and density. Recent studies indicate that 48-V voltage regulator modules (VRMs), instead of 12-V VRMs, are deemed a more efficient and cost effective architecture. In this paper a Gallium Nitride (GaN) based design of a two-stage solution is proposed. The first stage is a 48 V/12 V-250 W LLC converter with a matrix transformer design operating at 1.6 MHz with a peak efficiency of 97.3% and a power density of 870 W/in<sup>3</sup>. The second stage is a 12/1.8 V multiphase buck converter which can be either a conventional silicon-based or a GaN-based design with a higher operating frequency and power density. Furthermore, in this proposed two-stage architecture, a novel light load improvement mechanism is proposed by dynamically changing the bus voltage from 12 to 6 V during light load by which the system can achieve a more than 8% efficiency improvement.
URI: http://localhost/handle/Hannan/206273
volume: 64
issue: 12
More Information: 9302,
9310
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7938363.pdf1.56 MBAdobe PDF